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Finding the Fourth Proportional to 269,688,912.65, 404,547,302.90 and 85,475,961.69

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Solution

The fourth proportional to 269,688,912.65, 404,547,302.90 and 85,475,961.69 is: 128,218,358.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    269,688,912.65 : 404,547,302.90 = 85,475,961.69 : x
  2. Step 2: Convert to fraction form
    269,688,912.65/404,547,302.90 = 85,475,961.69/x
  3. Step 3: Cross multiply
    269,688,912.65x = 404,547,302.90 × 85,475,961.69
  4. Step 4: Simplify right side
    269,688,912.65x = 34,579,069,762,688,636
  5. Step 5: Solve for x
    x = 34,579,069,762,688,636/269,688,912.65
  6. Step 6: Final answer
    x = 128,218,358.79

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.